高压物理学报2017，Vol.31Issue(3)：249-260,12.DOI:10.11858/gywlxb.2017.03.006
具有不同界面相厚度的混凝土动态特性
Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone
摘要
Abstract
From a micromechanical point of view,concrete was considered as a three-phase composite composed of cement mortar,coarse aggregate and interface transition zone (ITZ) between them.In order to study the influence of ITZ on the dynamic mechanical behavior of concrete,we designed a two dimensional circular coarse aggregate random distribution program to simulate the dynamic failure process of concrete with different ITZ sizes,and analyzed the influences of the ITZ size,the specimen size,and the particle size and the volume fraction of coarse aggregate on the load-carrying capacity of concrete.Numerical simulation showed that the concrete with different ITZ sizes has an obvious size effect.The load-carrying capacity of the concrete with different ITZ sizes decreases with the size of ITZ.When the ITZ size and the particle size of the coarse aggregate are kept unchanged,the loadcarrying capacity of the concrete increases at first and then decreases with the volume fraction of the coarse aggregate;when the minimum particle diameter of the coarse aggregate and the ITZ size are kept constant,the load-carrying capacity of the concrete increases at first and then decreases with the increase of the maximum particle diameter of the coarse aggregate.关键词
混凝土/界面相/粗骨料/动态力学性能Key words
concrete/interface transition zone (ITZ)/coarse aggregate/dynamic mechanical properties分类
数理科学引用本文复制引用
刘海峰,吴萍..具有不同界面相厚度的混凝土动态特性[J].高压物理学报,2017,31(3):249-260,12.基金项目
国家自然科学基金(51368048,11162015) （51368048,11162015）
教育部“长江学者和创新团队发展计划”创新团队项目(IRT1067) （IRT1067）
